diff --git a/libraries/AP_HAL_ChibiOS/hwdef/crazyflie2/hwdef-bl.dat b/libraries/AP_HAL_ChibiOS/hwdef/crazyflie2/hwdef-bl.dat
new file mode 100644
index 0000000000..f83360b223
--- /dev/null
+++ b/libraries/AP_HAL_ChibiOS/hwdef/crazyflie2/hwdef-bl.dat
@@ -0,0 +1,43 @@
+# hw definition file for processing by chibios_pins.py
+# for crazyflie2.0
+
+# MCU class and specific type
+MCU STM32F4xx STM32F405xx
+
+# board ID for firmware load
+APJ_BOARD_ID 12
+
+# crystal frequency
+OSCILLATOR_HZ 8000000
+STM32_PLLM_VALUE 8
+
+define STM32_ST_USE_TIMER 5
+
+FLASH_SIZE_KB 1024
+
+# don't allow bootloader to use more than 16k
+FLASH_USE_MAX_KB 16
+
+# bootloader is installed at zero offset
+FLASH_RESERVE_START_KB 0
+
+# LEDs
+PD2 LED_BOOTLOADER OUTPUT HIGH
+PC0 LED_ACTIVITY  OUTPUT HIGH
+define HAL_LED_ON 0
+
+# the location where the bootloader will put the firmware
+FLASH_BOOTLOADER_LOAD_KB 64
+
+# board voltage
+STM32_VDD 330U
+
+# order of UARTs
+UART_ORDER OTG1
+
+PA11 OTG_FS_DM OTG1
+PA12 OTG_FS_DP OTG1
+
+define HAL_USE_EMPTY_STORAGE 1
+define HAL_STORAGE_SIZE 15360
+